



Publications
Two pollutants - total phosphorus (TP) and total nitrogen (TN) - that are significant in aquatic environments are included on the NPI substance list.
This report details how the catchment study was completed.
First published in November 2002
ISBN: 1 920687 319
Water and Rivers Commission
Western Australia
The full document is available for downloading as a PDF file. You will need Adobe Acrobat Reader installed on your computer to view the PDF file.
If you are unable to access this document, please contact the Department of the Environment and Heritage to organise a suitable alternative format.